China GNMNE Bus-type Molded Case Circuit Breaker Suppliers, Factories

Gongneng Electric's GNMNE molded case circuit breaker series is a high-performance protection device designed for photovoltaic power generation and power grid-connected systems, providing AC800/1000V, 63-250A electrical protection. The products cover two types: thermal magnetic type (ICU up to 70kA) and intelligent type (supporting human-machine interconnection and online diagnosis). It adopts an innovative busbar anti-electric shock design and a phase-separated closed structure to effectively prevent the risk of electric shock and short circuit. It meets the stringent requirements of the power industry and is the choice for the safe operation of new energy grid-connected and distribution systems.

Product Description

Product Description

GNMNE series plastic shell circuit breakers are engineered for AC lines with rated working voltages of AC800/1000V and rated currents ranging from 63A to 250A. These units are specifically designed for high-demand environments, including AC combiner boxes and cabinets within the photovoltaic power generation industry, as well as grid-connected cabinets in the power sector. They provide essential electrical energy distribution while protecting lines and power equipment from hazards such as overload, short circuits, and other critical faults.

Product Introduction

The combiner type molded case circuit breaker series consists of two distinct product lines designed for specialized industrial applications.

⚙️ Thermal Magnetic Series
  • Shell Frames: 125, 320, 400, and 630 frames.
  • Current Range: 16A ~ 630A.
  • Breaking Capacity: lcu=70/50kA, lcs=50/35kA.
📱 Intelligent Series
  • Shell Frames: 125, 320, 400, and 630 frames.
  • Current Range: 16A ~ 630A.
  • Breaking Capacity: lcu=70/50kA, lcs=50/35kA.
  • Smart Functions: Human-machine interconnection, online testing, and fault record downloads.
Key Technical Features
1. Busbar Anti-Electric Shock Design

The busbar shell incorporates all-round protection, ensuring safe operation with electricity. This design eliminates grounding faults caused by external factors such as moisture, dust, or foreign objects. The phase-separated enclosed structure prevents phase-to-phase short circuits.

2. Reduced Internal Temperature Rise

By integrating the busbar connection strip with the circuit breaker, the number of transition strip connection points is reduced. This decreases the temperature rise at connection points by 20%, leading to a significant overall reduction in internal heat for the complete set.

3. Standardized Installation Efficiency

With a standardized busbar spacing of 45mm across all shell products, installation requires 30% less connection material. This results in a 20% reduction in installation volume and improves overall installation efficiency by 60%.

4. Zero Arc Distance

Utilizing a revolutionary high-breaking structure design—including an optimized arc extinguishing system and air flow channels—the product achieves zero arcing distance for breaking operations, significantly enhancing safety.

Frequently Asked Questions
What is the rated voltage range for GNMNE series circuit breakers?
The GNMNE series is suitable for AC lines with rated working voltages of AC800V and AC1000V.
What industries are these circuit breakers best suited for?
They are widely used in the photovoltaic industry for AC combiner boxes and in the power industry for grid-connected cabinets.
How does the "Zero Arc Distance" design benefit the user?
The zero arcing distance design improves safety by containing the arc within the device during breaking, allowing for more compact installations and reducing fire hazards.
What smart features are included in the Intelligent series?
The intelligent series supports human-machine interconnection, real-time online testing, and the ability to download fault records for maintenance analysis.
How does this product improve installation speed?
By utilizing a standardized 45mm busbar spacing across all frames, it reduces material usage by 30% and increases installation efficiency by up to 60%.
What are the available shell frame sizes?
Both the thermal magnetic and intelligent series offer four shell frame sizes: 125, 320, 400, and 630.

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